8. reason the faculty or power of acquiring intellectual knowledge, either by direct understanding of first principles or by argument.
9. reason the power of intelligent and dispassionate thought, or of conduct influenced by such thought.
10. (v.i.)reason to think or argue in a logical manner.
11. reason to form conclusions, judgments, or inferences from facts or premises.
12. reason to urge reasons that should determine belief or action.
13. (v.t.)reason to think through logically, as a problem (often fol. by out).
14. reason to conclude or infer.
15. reason to convince, persuade, etc., by reasoning.
16. reason to support with reasons.
Definition of 'reason'
Princeton's WordNet
1. (noun)reason, ground a rationalmotive for a belief or action "the reason that war was declared"; "the grounds for their declaration"
2. (noun)reason an explanation of the cause of some phenomenon "the reason a steady state was never reached was that the back pressure built up too slowly"
3. (noun)reason, understanding, intellect the capacity for rational thought or inference or discrimination "we are told that man is endowed with reason and capable of distinguishing good from evil"
4. (noun)rationality, reason, reasonableness the state of having good sense and sound judgment "his rationality may have been impaired"; "he had to rely less on reason than on rousing their emotions"
5. (noun)cause, reason, grounds a justification for something existing or happening "he had no cause to complain"; "they had good reason to rejoice"
6. (verb)reason a fact that logically justifies some premise or conclusion "there is reason to believe he is lying"
7. (verb)reason, reason out, conclude decide by reasoning; draw or come to a conclusion "We reasoned that it was cheaper to rent than to buy a house"
8. (verb)argue, reason present reasons and arguments
9. (verb)reason think logically "The children must learn to reason"
1. (noun)reason a piece of information that explains why sth happened The report gave engine failure as the reason for the crash.; There were lots of reasons why he got mad.; Give me one good reason why I should believe you.
2. reason for some reason indicates you do not know why She was really upset for some reason.
3. reason information or evidence that shows that it is right to believe sth We have reason to believe he has the stolen goods.
4. reason all the more reason making a stronger argument The higher gas prices are all the more reason to travel less.
5. reason the range of behaviors that are considered sensible or acceptable You can do anything you want, within reason.
6. reason within reason the naturalability of humans to think, understand, make arguments, etc. the power of reason
7. (verb)reason to think or decide after considering facts "They'll never look for us here," he reasoned.
8. reason to use the natural human ability for reason Our ability to reason makes us different from animals.
Definition of 'reason'
Webster Dictionary
1. (noun)reason a thought or a consideration offered in support of a determination or an opinion; a just ground for a conclusion or an action; that which is offered or accepted as an explanation; the efficient cause of an occurrence or a phenomenon; a motive for an action or a determination; proof, more or less decisive, for an opinion or a conclusion; principle; efficient cause; final cause; ground of argument
2. (noun)reason the faculty or capacity of the human mind by which it is distinguished from the intelligence of the inferior animals; the higher as distinguished from the lower cognitive faculties, sense, imagination, and memory, and in contrast to the feelings and desires. Reason comprises conception, judgment, reasoning, and the intuitional faculty. Specifically, it is the intuitional faculty, or the faculty of first truths, as distinguished from the understanding, which is called the discursive or ratiocinative faculty
3. (noun)reason due exercise of the reasoning faculty; accordance with, or that which is accordant with and ratified by, the mind rightly exercised; rightintellectual judgment; clear and fair deductions from true principles; that which is dictated or supported by the common sense of mankind; right conduct; right; propriety; justice
4. (noun)reason ratio; proportion
5. (noun)reason to exercise the rational faculty; to deduce inferences from premises; to perform the process of deduction or of induction; to ratiocinate; to reach conclusions by a systematic comparison of facts
6. (noun)reason hence: To carry on a process of deduction or of induction, in order to convince or to confute; to formulate and set forth propositions and the inferences from them; to argue
7. (noun)reason to converse; to compare opinions
8. (verb)reason to arrange and present the reasons for or against; to examine or discuss by arguments; to debate or discuss; as, I reasoned the matter with my friend
9. (verb)reason to support with reasons, as a request
10. (verb)reason to persuade by reasoning or argument; as, to reason one into a belief; to reason one out of his plan
11. (verb)reason to overcome or conquer by adducing reasons; -- with down; as, to reasondown a passion
12. (verb)reason to find by logical processes; to explain or justify by reason or argument; -- usually with out; as, to reason out the causes of the librations of the moon
Definitions of 'reason'
The Nuttall Encyclopedia
1. reason in philosophy is more than mere understanding or reasoning power; it is the constitutive and regulative soul of the universe assumed to live and breathe in the inner life or soul of man, as that develops itself in the creations of human genius working in accord with and revealing the deep purpose of the Maker.
2. reason in GermanVernunft, defined by Dr. Stirling "the faculty that unites and brings together, as against the understanding," in GermanVerstand, "the faculty that separates, and only in separation knows," and that is synthetic of the whole, whereof the latter is merely analytic of the parts, sundered from the whole, and without idea of the whole, the formerbeing the faculty which construes the diversity of the universe into a unity or the one, whereas the latter dissolves the unity into diversity or the many.
Sense: something which makes something happen, describes why it happened, should happen or is going to happen etc What is the reason for this noise?; What is your reason for going to London?; The reason (why) I am going is that I want to.
Definitions of reason 
Afrikaans: rede
Arabic: سَبَب
Bulgarian: причина
Brazilian: razão
Czech: příčina, důvod
German: der Grund
Danish: årsag; grund
Greek: λόγος, αιτία
Spanish: razón
Estonian: põhjus
Farsi: علت؛ دلیل
Finnish: syy
French: raison
Hebrew: סִיבָּה
Hindi: कारण, प्रयोजन
Croatian: razlog
Hungarian: ok
Indonesian: penyebab, alasan
Icelandic: ástæða
Italian: ragione
Japanese: 理由
Korean: 이유, 원인
Lithuanian: priežastis, motyvas
Latvian: cēlonis; iemesls
Malay: penyebab
Dutch: reden
Norwegian: grunn,årsak
Polish: powód
Persian: علت؛ دلیل
Pashto: دليل، برهان علت، سبب، وجه
Portuguese: razão
Romanian: motiv, cauză
Russian: причина
Slovak: príčina, dôvod
Slovenian: vzrok; razlog
Serbian: razlog
Swedish: skäl, anledning, grund, o
Thai: เหตุผล
Turkish: neden, sebep
Taiwanese: 理由
Ukrainian: причина, привід
Urdu: وجہ
Vietnamese: lý do
Chinese: 理由
